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In Reply to: RE: Why More Power? posted by pictureguy on July 09, 2015 at 01:00:15
Since the sensitivity is not better but max SPL is better I would say they used their stronger magnetic field to increase the offset (and thus xmax) of the diaphragm and get less distortion at the same spl.
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I've been thru this entire line of magnet stuff a couple times.
One possible conclusion is that the magnets / gap are the same because MYLAR has such a low
'cooeficient of stretch'. Whatever THAT measure is called.
So it wouldn't be much advantage to have more gap when the mylar won't stretch to fill it.
I've also messed with Ultra-High strength magnets. You can hurt yourself with them via 'pinch'.
And the REAL strong ones will send you to the doctor. They are typically brittle, too. I couldn't imaagine what it takes to assemble a pole piece with such magnets. Keep them well spaced from each other, too!
One question remains, however. How much louder will the RIBBON play than a planar driver? The ribbon WILL benefit from stronger magnets, too.
Problem is making a very sensitive ribbon with a much LESS sensitive panel.
Too much is never enough
My investigations of various Magneplanar bass drivers surprised me. They are almost equally limited in the capability of excursions, even the Tympani IVa. 150-200 W on each driver results in the Mylar hitting the magnets if low frequencies are present that hits the tuning frequencies of the eriver. This will not happen with most "conventional" music but higher SPL can sound a bit compressed. The Tympanis have a similar efficiency to the 3-series. The Tympani bass drivers use thinner wires (half the mass) and lose 3 dB but as the number of drivers is double, the result is -3 +3 = 0 dB.
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